Chemistry of Fire Extinguishing Agents: Review and answer the below scenerios.a. The OSHA regulation at 29 C.F.R. §1910.162(b)(5) requires employers to provide a predischarge-employee alarm system to alert employees if a carbon dioxide concen-tration of 4% or greater is released from a fixed extinguishing system in a workplace. What is the most likely reason OSHA enacted this regulation? b. At 14 C.F.R. §121.265, FAA allows carbon dioxide to be used as a fire extinguish-ing agent onboard aircraft, provided that provisions are made to prevent harmful concentrations from entering any personnel compartment. Use Table 5.6 to deter-mine whether adverse health effects are likely to be experienced by a crew member who is confined to a compartment in which the air contains 8, carbon dioxide.c. The chemical formula of methyl bromide is CH3Br. Why does methyl bromide per-form effectively as a fire extinguishing agent?d. A potential risk of inhalation toxicity may occur to individuals that are exposed to the thermal decomposition products of Halon 1301 and Halon 1211. What specific thermal decomposition product causes this health hazard? III Effects Caused by Inhaling Air Containing ElevatedLevels of Carbon DioxideaTABLE 5.6PERCENT BY VOLUMECARBON DIOXIDESIGNS AND SYMPTOMS0.1Impaired work performance; lowered mental ability and decision-making performanceb1Breathing rate increases slightly; drowsiness upon prolonged exposureIncreased blood pressure and pulse rate; prolonged exposure may causeheadache and tiredness; reduced hearing2Breathing rate increases to two times the normal rate and becomeslabored; impaired hearing; mild headache; sweating; increased bloodpressure and pulse rate3Breathing rate increases to four times the normal rate; stimulation ofrespiration; dizziness; confusion; sweating; nausea4-5Very labored breathing; headache; visual impairment; ringing in theears; restlessness; disorientation; impaired judgment, followed by loss ofconsciousness5-1010–100Tremors; convulsions; loss of consciousness after 15-minute exposure,resulting in death*Adapted in part from "Health effects of carbon dioxide gas," Canadian Centre for Occupational Health andSafety (2012).bU. Satish et al., "Is CO2 an indoor pollutant? Direct effects of low to moderate CO, concentrations on humandecision-making performance," Environmental Health Perspectives, pp. 1671–1677 (2012). DOI:10.1289/ehp.1104789.

Answered: The OSHA regulation at 29 C.F.R.…

Chemistry

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ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

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Chemistry of Fire Extinguishing Agents: Review and answer the below scenerios.

a. The OSHA regulation at 29 C.F.R. §1910.162(b)(5) requires employers to provide a predischarge-employee alarm system to alert employees if a carbon dioxide concen-tration of 4% or greater is released from a fixed extinguishing system in a workplace. What is the most likely reason OSHA enacted this regulation?

b. At 14 C.F.R. §121.265, FAA allows carbon dioxide to be used as a fire extinguish-ing agent onboard aircraft, provided that provisions are made to prevent harmful concentrations from entering any personnel compartment. Use Table 5.6 to deter-mine whether adverse health effects are likely to be experienced by a crew member who is confined to a compartment in which the air contains 8, carbon dioxide.

c. The chemical formula of methyl bromide is CH3Br. Why does methyl bromide per-form effectively as a fire extinguishing agent?

d. A potential risk of inhalation toxicity may occur to individuals that are exposed to the thermal decomposition products of Halon 1301 and Halon 1211. What specific thermal decomposition product causes this health hazard?

III Effects Caused by Inhaling Air Containing Elevated
Levels of Carbon Dioxidea
TABLE 5.6
PERCENT BY VOLUME
CARBON DIOXIDE
SIGNS AND SYMPTOMS
0.1
Impaired work performance; lowered mental ability and decision-
making performanceb
1
Breathing rate increases slightly; drowsiness upon prolonged exposure
Increased blood pressure and pulse rate; prolonged exposure may cause
headache and tiredness; reduced hearing
2
Breathing rate increases to two times the normal rate and becomes
labored; impaired hearing; mild headache; sweating; increased blood
pressure and pulse rate
3
Breathing rate increases to four times the normal rate; stimulation of
respiration; dizziness; confusion; sweating; nausea
4-5
Very labored breathing; headache; visual impairment; ringing in the
ears; restlessness; disorientation; impaired judgment, followed by loss of
consciousness
5-10
10–100
Tremors; convulsions; loss of consciousness after 15-minute exposure,
resulting in death
*Adapted in part from "Health effects of carbon dioxide gas," Canadian Centre for Occupational Health and
Safety (2012).
bU. Satish et al., "Is CO2 an indoor pollutant? Direct effects of low to moderate CO, concentrations on human
decision-making performance," Environmental Health Perspectives, pp. 1671–1677 (2012). DOI:10.1289/ehp.1104789.

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